Scio Occultus Res
Legendary Mage Kings of Atlantis, who built a golden ladder to reach the Supernal World in body. There they established themselves as gods over the Mundane World, fighting off their brethren who sought to deny them such total power over the rest of the world.
The Exarchs were victorious, and the golden ladder destroyed to prevent any from following them to the Supernal World and challenging their power. In the process of this victory, whether by design or accident, the Abyss was created, and the Quiescence took dominance over the Mundane World, transforming most of the populace into Sleepers.